{"data":{"id":"us/40-cfr-610.23","jurisdiction":"us","citation":"40 CFR 610.23","heading":"Operator interaction effects.","body":"The device will also be evaluated with respect to:\n(a) The degree of sensitivity of device effectiveness to variances in installation, operation and maintenance;\n(b) The adequacy of manufacturer-furnished instructions for minimizing variances in installation, operation and maintenance;\n(c) The extent to which device installation or use, or the effects of such installation or use, relate to Federal emission control regulations;\n(d) Effects on the performance, safety, or occupant comfort of the retrofitted vehicle, and on that of other vehicles; and\n(e) The relationship between total cost of ownership of the device (purchase price plus maintenance costs) and the cost savings realizable from its fuel economy effects.","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER Q—ENERGY POLICY","PART 610—FUEL ECONOMY RETROFIT DEVICES","Subpart B—Evaluation Criteria for the Preliminary Analysis"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-40.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:04Z","sha256":"8d822c5d9e7a95e7067218dfbbcd5c40ae92a51dbdce4e90e9f5c52b4d340250","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-610.22","next":"us/40-cfr-610.24"},"notice":"GroundRules: Original legal text. Not legal advice."}